Note 580 — Chapter VI · LUNAR CALENDARS AND THE WEEK
Reading edition
Payne, op. cit., ii, 310, 323 sqq., 355 sqq.; J. de Acosta, op. cit., bk. vi, ch. 2 (ed. C. R. Markham, ii, 393); H. H. Bancroft, The Native Races of the Pacific States of North America, ii, 515 sq. For other and less plausible reasons leading to the choice of the number thirteen, see C. P. Bowditch, The Numeration, Calendar Systems, and Astronomical Knowledge of the Mayas, Cambridge (Mass.), 1910, pp. 266 sq.